Question

Using The method of joints determine the force in each member
of the truss shown. State whether each member is in tension or
compression.

I know the picture is of poor quality so let me explain the
picture. The force on A and C are both 8.4 kN. The vertical
distance from A to B is 4.5 m and the vertical distance from B to D
is also 4.5 m. The horizontal distance from C to D is 2.5 m. The
joint at point B is fixed and the joint at point D is a roller
joint.